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Turns a sentence, topic or PDF into a labeled science or math diagram in seconds, with free PNG export, built for STEM teachers prepping lessons and their students.
FreeCan export my data
What to know▼
How it works
Turns a sentence, topic or PDF into a labeled, classroom-ready diagram for biology, chemistry, physics or K-12 math, with print-ready PNG export.
Pricing
Free to start, with 150+ free tools.
Best for
STEM teachers preparing lesson figures and students who need a quick labeled diagram.
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A calm, step-by-step guide to using the TI-Nspire CAS calculator across Analysis, Algebra, Statistics and Geometry, for upper-secondary students stuck with a 300-page manual and scattered tutorials.
FreeNo sign-upWorks offline
What to know▼
How it works
A step-by-step guide app for the TI-Nspire CAS calculator, covering key-by-key instructions across Analysis, Algebra, Statistics and Geometry.
What's different
Turns long menu paths from the 300-page manual into structured, searchable explanations, built for students rather than engineers.
Best for
Upper-secondary students handed a TI-Nspire CAS calculator who need clear instructions instead of the manual or scattered tutorials.
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A free web terminal that scores geopolitical risk for 195 countries hourly from public and market data, for anyone who wants institutional-grade risk intelligence without paying for a subscription.
Free
What to know▼
How it works
Aggregates 25+ live sources (conflict data, markets) into a 0-100 score per country updated hourly, with twice-daily AI briefings, a live event river, and an interactive risk map, backed by an open methodology.
Pricing
Free, no paywall or institutional login required.
Best for
People who want free access to geopolitical risk intelligence without an institutional subscription.
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A free calculator that computes a student's exact SRM semester GPA using the official credit-weighted formula, without manually entering subjects or credits.
Free
What to know▼
How it works
Select your grades and it applies SRM's official credit-weighted formula to output your GPA in seconds.
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A free guide that helps Bangladeshi students evaluate study-abroad consultants for studying in India, covering university partnerships, scholarships, admission requirements, and costs.
Free
What to know▼
How it works
Walks through how to verify a consultancy's university partnerships, compare scholarships, and estimate study costs across fields like engineering, business, pharmacy, nursing, and MBBS/PhD.
Best for
Bangladeshi students choosing a study-abroad consultant for India.
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A link-in-bio page builder that's free to start, with a one-time $5 Pro upgrade instead of a monthly subscription — click analytics, GIF avatars and animated themes included.
FreePay onceNo subscription
What to know▼
How it works
A link-in-bio page builder that aggregates links to Instagram, TikTok, YouTube, X and 25+ other platforms, with click analytics, GIF avatars and themes. Pages are statically cached for fast loading.
What's different
Pro is a $5 one-time payment instead of a recurring subscription.
Pricing
Free forever tier; Pro is $5 once for animated neon themes, 100 links, a second card and per-link background photos.
Best for
Creators who want a link-in-bio page without committing to a monthly subscription.
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69 free, browser-based audio and video tools — format conversion, loudness metering, spectrogram viewing, trimming — that run entirely client-side so files never leave your device.
FreeNo sign-upNothing to install
What to know▼
How it works
69 audio and video tools -- hi-res audio analysis, LUFS loudness measurement, spectrogram viewing, format conversion, video trimming -- that run entirely client-side in the browser.
What's different
Files never leave your device since processing is 100% client-side, with no signup, watermarks, or limits.
Pricing
Free.
Best for
Anyone needing quick audio/video processing without installing software or uploading files.
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An AI worksheet generator for teachers that turns uploaded textbooks, PDFs, or notes into printable worksheets and answer sheets, refinable in a visual editor.
Free
What to know▼
How it works
Generate worksheets through conversation with AI, including explanations, multiple-choice, fill-in-the-blank, and free-response questions, then refine in a visual editor; can upload textbooks, PDFs, or images as reference material.
Pricing
Free.
Best for
Teachers creating printable, classroom-ready worksheets with answer sheets.
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A free 8-question quiz that grades your SaaS's retention, pricing and growth health, no signup required — a lead magnet for North Metric's paid Stripe-connected platform.
Watch out · It's a free lead magnet for North Metric's paid, Stripe-connected revenue intelligence platform.
FreeNo sign-up
What to know▼
How it works
An 8-question quiz that grades your SaaS's health across retention, pricing, growth, unit economics and ops cadence, giving an instant A+ to C grade with a breakdown of strongest and weakest dimension.
Pricing
Free, no signup, no Stripe connection required, takes 60 seconds.
Best for
SaaS founders who want a quick health check before deciding whether to go deeper with North Metric's paid platform.
Watch out
It's a free lead magnet for North Metric's paid, Stripe-connected revenue intelligence platform.
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A free planning tool for Canadian high-schoolers to track grades, log extracurriculars, and build an OUAC university application snapshot.
Free
What to know▼
How it works
A planning tool for Canadian high school students to track grades, explore 56 extracurriculars, plan every grade level, and build an OUAC university application snapshot.
Pricing
Free.
Best for
Canadian high schoolers preparing university applications through OUAC.
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A free internet speed test that measures download and upload speed, ping, jitter, bufferbloat, and packet loss with A-F grades, for people who want more insight than basic speed tests provide.
FreeNo ads
What to know▼
How it works
Measures download, upload, ping, jitter, bufferbloat, loaded latency, packet loss, and connection stability, with A-F grades and no ads or account required.
Best for
Gamers, remote workers, and streamers who want to understand real-world connection problems beyond a basic speed number.
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A free suite of over 30 academic calculators — GPA/CGPA, attendance, percentages — for students tracking coursework against their school's grading rules.
Free
What to know▼
How it works
A suite of over 30 academic calculators, including GPA/CGPA calculators that support university-specific grading systems, plus attendance and percentage calculators.
Pricing
Free.
Best for
Students who need to track academic performance against their school's specific grading rules.
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A free link-in-bio page with no tracking or data selling, built for creators and indie hackers — the paid tier removes branding and adds an SEO backlink.
FreeNo tracking
What to know▼
How it works
A link-in-bio page builder with unlimited links and custom styles.
What's different
No trackers, no data selling, and the free tier is unlimited; a paid VIP tier removes branding and adds a high-authority dofollow backlink for SEO.
Pricing
Free core with unlimited links; VIP upgrade removes branding and adds an SEO backlink.
Best for
Creators and indie hackers who want a privacy-respecting link-in-bio page.
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Free, no-download random-choice tools — spinning wheels, team generators, slot-style selectors — for classrooms, workplaces and everyday decisions.
FreeNothing to install
What to know▼
How it works
A collection of random-choice tools — spinning wheels, balanced team generators, slot-style selectors, and Spin Sheets for drawing rows — where you can save and share your setups.
What's different
Works across desktop and mobile in nine languages with no download required.
Pricing
Free.
Best for
Teachers, classrooms, workplaces, and anyone needing a quick randomizer for teams, prizes, or decisions.
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A verified network matching busy students who need assignments done with other students who have free time and relevant skills, meant to replace ad-hoc WhatsApp and Instagram arrangements.
Free
What to know▼
How it works
Connects students who need assignments done with other students who have free time and relevant skills, through a verified network with matching in place of ad-hoc coordination.
What's different
Positioned as a managed, verified alternative to chaotic WhatsApp groups and unverified Instagram agencies.
Pricing
Free.
Best for
Students on a campus who need help with assignments, and other students looking to earn using free time and skills.
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A free, no-signup random wheel spinner for giveaways, classroom picks and everyday decisions — a general-purpose picker, not built specifically for teachers or workplaces.
FreeNo sign-up
What to know▼
How it works
Add your options to a wheel, spin, and get a fair random result; 40+ ready-made wheels are available for common use cases, and any wheel can be shared by link.
What's different
No sign-up or download required, and works on any device as an installable app.
Pricing
Free to use.
Best for
Anyone running giveaways, classroom picks, team selection, or everyday decisions.
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Free, ad-free single-purpose web tools meant to run fullscreen in a classroom — the listing gives no further detail on which specific tools are included.
FreeNo ads
What to know▼
How it works
A set of free, single-purpose web tools built to run fullscreen in a classroom.
Pricing
Free.
Best for
Teachers who want ad-free, fullscreen tools to use during class.
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Free, open-source school-to-parent communication platform you self-host with Docker — announcements, homework, fee notices and permission slips, no per-pupil license fee.
